The urethane inserts are nice, especially for a FWD car, if you're revving it out a bit, because they pretty much eliminate wheel hop. You will notice the car vibrate a bit more, but it's not too heavy unless you have the balance shafts out as well. I have no balance shafts and urethane mounts and I only notice it at idle. After I start moving, I don't even feel it anymore.
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I don't know if you will find many places that sell the inserts and the mounts. You can take your mounts off and bring them to any shop with a press and they should be able to pop them right out for you, $20 maybe.